25kg from ebay . . . probably would cost more in postage LOL. What's the source?

The Boots brand sounds like it might be good to try, and if it makes me feel worse rather then better, then not much money lost.

I can take pretty high doses of magnesium without any trouble so I should be OK with that. Not as sure about the sulphur, but I don't have huge troubles with sulphurous foods. Sometimes they do make me feel anxious.

Thanks for the tips everyone, I'll give this a try when I get the chance.

Linda <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />